'This fasting...is very good, provided the commandments of the Lord be observed...First of all, be on your guard against every evil word, and every evil desire, and purify your heart from all the vanities of this world. If you guard against these things, your fasting will be perfect.' - The Shepherd of Hermas

The Kingdom of God is here a Temple, in the erection of which a certain stone, rejected as unsuitable by the spiritual builders, is, by the great Lord of the House, made the keystone of the whole. On that Stone the builders were now "falling" and being "broken" (Isaish 8:15),

"Many will stumble over them, Then they will fall and be broken; They will even be snared and caught." (Isaiah 8:15)

That is, "sustaining great spiritual hurt; but soon that Stone should fall upon them and grind them to powder" (Da 2:34, 35; Zec 12:3) --in their corporate capacity in the tremendous destruction of Jerusalem, but personally, as unbelievers, in a more awful sense still. (Jamieson, Fausset, Brown )

The builders had had some other Messiah reign over them that would cater to their whims and fulfill their Messianic concepts. The issue is a matter of authority; they claimed the wanted a King, but when Christ came they would not that He should reign over them.

Christ is the capstone of the Church- without him all the stones would fall to the ground. We are builded upon the foundation of the apostles and prophets- Jesus Christ Himself being the Chief Corner Stone.

Whether capstone or cornerstone both are the most important stones to a structure. The cornerstone is the one from which the rest must be built. If the cornerstone is 'off' the whole structure will be 'off'. It also serves as an anchor on the corner. If the Corner stone is not placed in its right place as the chief corner stone the weight of that misplaced stone will cause the whole of the structure to tumble down. This is because the cornerstone is the largest and heaviest stone. This is true in building most any type of block structure. The corners must be the largest and heaviest pieces.

We have in this prophecy a picture of the results of our having miss-placed Christ in our life.(i.e. we have not made Him Lord) We also have the matter of either falling upon Him and being broken (in recognition of our great need for repentance and regeneration) or in the day of Judgment He will fall upon us in His wrath and gring us into powder. Falling on Christ is a painful thing to endure- but the alternative is utter destruction.

But those mine enemies, which would not thatI should reign over them, bring hither, and slay them before me. (Luke 19:27)

For David himself said by the Holy Ghost, The LORD said to my Lord, Sit thou on my right hand, tillI make thine enemies thy footstool. (Mark 12:36)